/*
* 	Easy Slider 1.5 - jQuery plugin
*	written by Alen Grakalic	
*	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
*
*	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
*	Dual licensed under the MIT (MIT-LICENSE.txt)
*	and GPL (GPL-LICENSE.txt) licenses.
*
*	Built for jQuery library
*	http://jquery.com
*
*/

/*
*	markup example for $("#slider").easySlider();
*	
* 	<div id="slider">
*		<ul>
*			<li><img src="images/01.jpg" alt="" /></li>
*			<li><img src="images/02.jpg" alt="" /></li>
*			<li><img src="images/03.jpg" alt="" /></li>
*			<li><img src="images/04.jpg" alt="" /></li>
*			<li><img src="images/05.jpg" alt="" /></li>
*		</ul>
*	</div>
*
*/

(function($) {

	$.fn.easySlider = function(options) {

		// default configuration properties
		var defaults = {
			prevId: 'prevBtn',
			prevText: 'Previous',
			nextId: 'nextBtn',
			nextText: 'Next',
			controlsShow: true,
			controlsBefore: '',
			controlsAfter: '',
			controlsFade: true,
			firstId: 'firstBtn',
			firstText: 'First',
			firstShow: false,
			lastId: 'lastBtn',
			lastText: 'Last',
			lastShow: false,
			vertical: false,
			speed: 800,
			auto: false,
			pause: 2000,
			continuous: false
		};

		var options = $.extend(defaults, options);

		this.each(function() {
			var obj = $(this);
			var s = $("li", obj).length;
			var w = $("li", obj).width();
			var h = $("li", obj).height();
			obj.width(w);
			obj.height(h);
			obj.css("overflow", "hidden");
			var ts = s - 1;
			var t = 0;
			$("ul", obj).css('width', s * w);
			if (!options.vertical) $("li", obj).css('float', 'left');

			if (options.controlsShow) {
				var html = options.controlsBefore;
				if (options.firstShow) html += '<span id="' + options.firstId + '"><a href=\"javascript:void(0);\">' + options.firstText + '</a></span>';
				html += ' <span id="' + options.prevId + '"><a href=\"javascript:void(0);\">' + options.prevText + '</a></span>';
				html += ' <span id="' + options.nextId + '"><a href=\"javascript:void(0);\">' + options.nextText + '</a></span>';
				if (options.lastShow) html += ' <span id="' + options.lastId + '"><a href=\"javascript:void(0);\">' + options.lastText + '</a></span>';
				html += options.controlsAfter;
				$(obj).after(html);
			};

			$("a", "#" + options.nextId).click(function() {
				animate("next", true);
			});
			$("a", "#" + options.prevId).click(function() {
				animate("prev", true);
			});
			$("a", "#" + options.firstId).click(function() {
				animate("first", true);
			});
			$("a", "#" + options.lastId).click(function() {
				animate("last", true);
			});

			function animate(dir, clicked) {
				var ot = t;
				switch (dir) {
					case "next":
						t = (ot >= ts) ? (options.continuous ? 0 : ts) : t + 1;
						break;
					case "prev":
						t = (t <= 0) ? (options.continuous ? ts : 0) : t - 1;
						break;
					case "first":
						t = 0;
						break;
					case "last":
						t = ts;
						break;
					default:
						break;
				};

				var diff = Math.abs(ot - t);
				var speed = diff * options.speed;
				if (!options.vertical) {
					p = (t * w * -1);
					$("ul", obj).animate(
						{ marginLeft: p },
						speed
					);
				} else {
					p = (t * h * -1);
					$("ul", obj).animate(
						{ marginTop: p },
						speed
					);
				};

				if (!options.continuous && options.controlsFade) {
					if (t == ts) {
						$("a", "#" + options.nextId).hide();
						$("a", "#" + options.lastId).hide();
					} else {
						$("a", "#" + options.nextId).show();
						$("a", "#" + options.lastId).show();
					};
					if (t == 0) {
						$("a", "#" + options.prevId).hide();
						$("a", "#" + options.firstId).hide();
					} else {
						$("a", "#" + options.prevId).show();
						$("a", "#" + options.firstId).show();
					};
				};

				if (clicked) clearTimeout(timeout);
				if (options.auto && dir == "next" && !clicked) {
					;
					timeout = setTimeout(function() {
						animate("next", false);
					}, diff * options.speed + options.pause);
				};

			};
			// init
			var timeout;
			if (options.auto) {
				;
				timeout = setTimeout(function() {
					animate("next", false);
				}, options.pause);
			};

			if (!options.continuous && options.controlsFade) {
				$("a", "#" + options.prevId).hide();
				$("a", "#" + options.firstId).hide();
			};

		});

	};

})(jQuery);